Street



C. F. STREET.

MECHANICAL STOKER.

APPLICATION man JUNE 9.1913.

ATTORN Patented Aug. 22, 1916.

3 SHEETS-SHEET C. F. STREET.

MECHANICAL STOKER.

APPLICATION mm JUNE 9.1913.

Patented Aug. 22, 1916 3 SHEETS-SHEET 2 C. FESTREET- MECHANICAL STOKER.

APPLICATION FILED nun: 9. 091a,

Patented Aug. 22, 1916.

3 SHEETS-SHEET 3.

CLEMENT Ta. STREET, 0F NEKV YORK. N. 17..

.ASSXGNOR TO THE LOCQMOTIVF, STOKER CDM'PANY, 0F V/ILMERDING, TRENNSYLVANIA. A CORPORATIQIN' OF FENI ISYLVANIA.

LIECHANICA'L SIOKER.

Specification of Letters Patent.

Patented Aug. 22. 11116.

Original application filed June 7,1910, Serial No. 585,579. Divided and. this application filed June 9, 1913.

- Serial No. 772,523.

To all wit-om. it may COIHRI'FJL.

Be it known that I, CLEMENT F. Srnner, of the borough of Manhattan, in the'ci ty, county, and State of New York, have 1nvented a certain. new and useful Improve ment in illechanical Stoker-s, of which improvement the following is a specifica tion.

My invention relates to mechanical stokers for feeding fuel to steam boiler fireboxes,

and is designed for the purpose of enabling fuel, in the form of lumps or grains, or what is commercially termed slack, to be pr0- jected into the firebox by the direct action upon it of a blast of fluid under pressure, and to be thereby distributed over the grate or bed Where it is burned.

My improved stoker is designed with a view of handling coal, coke, briquets or slack, and must be clearly distinguished from that class of stokers designed for handling pulverized or powdered fuel, which is burned in suspension and not on av grate or bed. For convenience, I will make use of the term lump fuel hereinafter to designate the kind of fuel to be used in my stoker, in. which term I include crushed coal, slack, briquets, and coke.

One of the objects of my invention is to provide improved means for feeding fuel of the character above described into the furnace and distributing the same over the grate area by one or more fluid pressure on erated distributing devices inserted through openings in the furnace wall; and another object is to provide improved means for regulating the feeding of the fuel by controlling the admission of fluid pressure to the dis" tributers.

The improvement claimed is hereinafter fully set forth.

In the accompanyin drawings: Figure 1 is a rear elevation of alocomotive boiler equipped with one form of mechanical Stoker embodying my improvement; Fig. 2, a side elevation, partly in section, of the rear end of the locomotive boiler and Stoker; Fig. 3, a vertical section of the fuel elevator and driving mechanism; Fig. 1, a vertical sectional view, on a larger scale, of the devices for controlling the fluid under pressure;

Fig. 5, vertical section of the controlling cam disk, taken on the line of Fig. 4; Fig. (3, a side elevation, partly in section, of one of the side distributors; Fig. 7, an end view of the same; Fig-8, a side elevation of the center distributer; Fig. 9, a transverse section of the same, taken on the line 9-9 of Fig. 8; and Fig. 10, a. section of the end flange of the same, taken on the line 10-10 of Fig. 8.

According to the construction shown in the drawings, a fuel receptacle, 11, is located below the door or deck of the cab, fuel being delivered thereto in any desired manner, and an elevator is employed for raising the fuel therefrom to a conduit or hopper above the furnace door, said conduit communicating with one or more distributers discharging upon the furnace grate.

As shown, the elevator consists of an endlcss chain of buckets, 13, inclosed within a tubular casing, of'inverted U-shape, the legs, 12, 12', of which terminate in the top of the fuelreceptacle, 11, and extend upwardly on opposite 'sides of the firing door, 6, and open into a fuel conduit or hopper, 1.8, located above saididoor.

The driving mechanism for the chain of buckets, 13, consists of a steam engine or other motor, 10, mountcdadjacent to the top of the casing, and driving through a worm or other gear, 17, (see Fig. 3), a. sprocket wheel, 15, which engages said chain. The latter passes around guide wheels, 14, 14, mounted in the-fuel receptacle, 11. As this elevator may be of any suitable wellknown construction, it is unnecessary to de scribe it in further detail.

The elevator delivers the fuel into the conduit or hopper, 18, to the bottom of which are connected three distributors, 19, 19 and 20, which pass through the water-wall, 21, of the fire-box, 4, the distributor 20 being located centrally above saiddoor and the distr'buters, 19, 19, bein located at the side thereof. Where the fiiruace is of large dimensions, more than three distributors may be used, if desired, while, for small furnaces, only one or-two distributors may be used The center distributor, 20, is wholly or the end being inclined rearwardly from the.

top downwardly, as shown in Figs. 8 and 10.

Adjacent to its front "end, this distributor has lateral apertures, 23,23, which open downwardly and rearwardly toward the grate, the rib, 22, being continued along the bottom. of the distributor-t0 a point in the rear of said apertures and having inclined sides, as shown in Figs. 8 and 9. Each of the side distrihuters,-19, 19, is open at its front end, the lower side, 24-, of the opening being inclined upward and straight, as shown in 6 and 7, and the upper side being extended, as shown, and having at its end a dependin lug, 25, at right angles to the edge, 2 ot the lower side of the opening. By the construction described, the center distrihuter delivers the fuel to the rear portion and rear corners of the grate, while the side distributors feed it straight forward onto the sides of the grate, the lug, 25, causing the fuel to be spread somewhat laterally. Of course, the zones of the grate grate surface.

onto which the fuel is deposited by the three distributers, are not finely demarked, but overlap each other, so that there is a. fairly uniform distribution over the entire The rear end of each distributer is provided with two openings, the larger one, 27, being for the admission of air and the smaller one, 28, communicating with a steam-pipe, 29, all of which pipes, 22),connect with u pipe, 30, leading from the steam space of the boiler, through the controlling valve, 32, (see Fig. 4). Of course, if desired. compressed air may be used instead of steam. The valve proper, 31, is normally held to its sent by the steam pressure and by a. spring, 33, thus shutting oil the steam from. the pipe, 30, leading-to the pipes, 29. The valve is opened intermittently by pressure applied to its stem, 34,.aud this is performed automatically by the ci1m-dish, 35, acting through the lever, 36, pivoted on n bracket, 37, on the valve-easing, and having :1 lug, 38, hearing egiinst said valve stem. Cum-disk, 35, is driven by the ole vntor motor, 16, in the instzlnce shown being mounted directly on the shaft of the procket wheel, 15.

Rotatnbly mounted within the crim-diskf are two cnmunemhers, 39, 39, each having,

two cum surfaces, 40 and 41, the former being of less peripheral extent than the latter, and each living it handle, 42, by which they can be rotated to hringeither cam-surface into operative position, or so that neither ClllllSlll'ftlCB will project from the periphery of the disk. To hold each cum-member in any one ofsuid three positions, it is provided with three recesses or notches, 4-4. with any one of whichn pawl, consisting of :1 list spring, 45,. with its end bent, can engage.

It will now be understoodthut the camdisk, as it rotates, will either open the valve, 31, once or twice, and 'for a longcrorshorter' time, according asto which canrsurfoce is projected, ornt at ell when neither camsurface is projected. Thus the fluid under pressure can either be cut off entirely from the three distributors, when for any reason it is desired to stop the feed of the fuel by the fluid under pressure, or can be admitted to the distributors once in each rotation of the cunwlisk, and that for it longer or shorter duration of time, according as to which camj' surface is projected, or the fluid (Fan be ad mitted twice in each rotntum of the disk,

either for two short periods, two long' periods, or for one short and one long period.

\Vhile I have shown and described the cam disk as provided with only two identical cum members, each provided'with two cam surfaces of different lengths, it will lie ohvious that more than two, or only one cam member may he provided onthe disk. and that each cam member may have different cum-surfaces from the other, if desired.

A nozzle, 46, for the steam or other fluid under pressure, is mounted in the opening, 28, at the rear end of each distributor. As this nozzle per so forms no part of m in rention, it will be unnecessary to describe it in. detail.

Means are provided within the distributor hopper, 18, to vary the proportion of fuel center distributor, and operated from out- L side by a handle, 'Whenthis deflector is pushed in, it prevents the fuel from entering thecentr distributor and t thegsenie time i deflects it laterally toward the side distributers. 0f course, when it is partially in, it also acts to deflect the fuel while, at the same time, permittiu'g.some of t to enter the center distrihuter, In this way, the supply of fuel to the individual distributors can be regulated 31nd controlled. ,It must 'be undcrstoodthat the fuel is not stored in the hopper, 18, but that the latter acts merely as a conduit to guide and control the admission of the fuel to the distributors.

In operation, lump fuel is raised by the bucket elevator, 13, through one of the legs, 12, of the tubular Ushaped casing, andis deli e edinto the distributer hopper,'18, from -Wl1il1 it falls by gravity into the three distributers, 19, 19 and 20, in amounts and onto the-grate in the manner above described. At the same time, there is no interference with the firing door, 6, so that the fireman can attend to the fire, and, if necessary, feed fuel to it by hand, as usual.

This application is a division of my original application Serial. No. 565,579, filed June Having now described my invention, what I claim as new and desire to secure by Letters Patentis;

1. In a mechanical stoker of the type described, the combination with a Source of fuel supply and a distributer connected thereto, of mechanism to admit fluid under pressure into said distributor periodically, a power device for driving said mechanism, and manually operable means to adjust said mechanism to vary the frequency of said admission independently of the speed of the driving device.

'2. In a mechanical stoker of the type described, -the combination. with a source of fuel supply and a distri-buter connected thereto, of powerdriven mechanism to. admit fluid under pressure into said distributor periodically, the successive admissions being of different duration, and manually operable lllEiLHSi-O adjust said mechanism to vary the duration of the successive admissions after saidadjustm'entf I 3. In a mechanical toker, of the type described, the combination with a source of fuel supply and a disti'ibuter connected thereto, of mechanism to admit fluid under pressure into said distributer periodically,

tion of a 'distributer, power mechanism for admitting. a continuous supply of fuel to said distributor, mechanism torintermittently admitting blasts of fluid under pressure to the distributor, a power device for driving said mechanism, and means for ad justiug said mechanism to vary the frequency of said blasts.

5. In a mechanical stoker in which the fuel is fed by fluid pressure; means to con irol the latter cou'iprising a valve and. a cam disk to operate the same, the mun surface of said disk being adjustable to vary the frequency of the operations of saidvali'r.

' 3. In a mechanical Stoker-in which the fuel is fed by fluid pressure, means to control the latter comprising a valve and a ram disk to operate the same, the cam surfaces of said disk being adjustable to vary the ire quency and duration of the operations of said valve.

7. In a mechanical stokerin which ihe fuel is fed by fluid 'pressure, means to coutrol the latter comprising afvalve and a cam disk to operate the same, the cam surfaces of said disk beingad ustable to vary the (frequency or duration or both the frequencyand duration of the operation of said valve. S. In a stoker-of the type described, a. distributer for feeding lump fuel into the furnace, said distributor having its'dcl'ivery end provided with an obstruction and having lateral apertures adjacent to said end,

said obstructed end beiumconstr-ucted with deflecting surfaces and adapted to'divert the fuel rearwardly through said apertures.

9. In a mechanical st0ker,a fluid pressure operated distributer having a closed eudand lateral openings adjacent thereto, a concave upper surface between the openings,.an d a central deflecting rib on its bottom ivall between the openings and extending up the ing up the end wall, the'said end 'wall having lateral outwardly and reariwardly inclined ribs.

1 1. In a stolc cr :of the'type described, a.

distributer for feeding lump fuel into the furnace, said distributor liai'ingits delivery end provided with an obstruction having two conca-vities divided a central rib, said end being open at the sides andsaid openings being separated at the bottom by a continuation of said rib.

12.,In a mechanical stoker,a distributor V for depositing the fuel upon the rear portion and onto the rear co rn'ersof't-he grate, said distributer havingia .rearwardly inclinixl front end provided with a central rib and lateral apertures adjacent tosaid end.

13. In a mechanical stoker, a distributer forde 'iositing the fuel upon a longitudinal section of the grate, said distribnter having its upper side-extended beyond its lower side and the latter being inclined upward at its end and having astraight delivery edge, the upper side being provided with. a-

log depending centrally al} right angles to grate, the center distributer being 'com 7 structed to direct thefuel rearwardiy and laterallyend the side distributors being con- 'gtpucted to deliver the fuel forwardly onto gwa'gsss 'the kingihgdinal side portions and toward the center of the grate. 4

CLEMENT F. STREET.

' Witnesses:

HELEN on MOYA, ALICE B. FLAGLER.

, 10- In testimony whereof I have hereunto set 

